use std::ops;

pub trait Range<T> {
	fn start(&self) -> Option<&T> {
		None
	}

	fn end(&self) -> Option<&T> {
		None
	}
}

impl<T> Range<T> for ops::Range<T> {
	fn start(&self) -> Option<&T> {
		Some(&self.start)
	}

	fn end(&self) -> Option<&T> {
		Some(&self.end)
	}
}

impl<T> Range<T> for ops::RangeTo<T> {
	fn end(&self) -> Option<&T> {
		Some(&self.end)
	}
}

impl<T> Range<T> for ops::RangeFrom<T> {
	fn start(&self) -> Option<&T> {
		Some(&self.start)
	}
}

impl<T> Range<T> for ops::RangeFull {}
